A magic script is great even if you are the developer who need the knowledge of how thr thing works. It is a single entry point which you can start reading and understanding.
I like to call these just "scripts" without the magic. Magic scripts install a bunch of stuff and configure your machine, but don't tell you what they're doing at all. This stuff infuriates, because the next thing I know I have an OpenJDK11 on my computer for seemingly no reason. What you really want is a script, so you can just directly run it, but it tells you what it is doing and why you need the thing. "I'm going to set up Kerberos so I can push to our Git instance"? That's what I want to see somewhere that's not just "oh you can find this in the 17th zip file we download and execute on your machine".
